African black wood is a very good alternative to other ebonies.
There are many species which are called 'Ebony' all pretty pricey but not all endagered.
There are also several kinds of wood called 'boxwood I only use Buxus sempervirens AKA European boxwood. These Indian and Chinese made sets use locally sourced boxwood substitutes, some of which whilst more quickly grown are very good if dried correctly.
Very nice, FrankHelwig. Congrats on the new set and thanks for sharing!